// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/android/content_view_render_view.h"

#include <android/bitmap.h>
#include <android/native_window_jni.h>

#include <memory>

#include "base/android/jni_android.h"
#include "base/android/jni_string.h"
#include "base/android/scoped_java_ref.h"
#include "base/bind.h"
#include "base/lazy_instance.h"
#include "base/message_loop/message_loop.h"
#include "cc/layers/layer.h"
#include "content/public/browser/android/compositor.h"
#include "content/public/browser/android/content_view_layer_renderer.h"
#include "content/public/browser/web_contents.h"
#include "jni/ContentViewRenderView_jni.h"
#include "ui/android/view_android.h"
#include "ui/gfx/android/java_bitmap.h"
#include "ui/gfx/geometry/size.h"

using base::android::JavaParamRef;
using base::android::ScopedJavaLocalRef;

namespace content {

// static
bool ContentViewRenderView::RegisterContentViewRenderView(JNIEnv* env)
{
    return RegisterNativesImpl(env);
}

ContentViewRenderView::ContentViewRenderView(JNIEnv* env,
    jobject obj,
    gfx::NativeWindow root_window)
    : root_window_(root_window)
    , current_surface_format_(0)
{
    java_obj_.Reset(env, obj);
}

ContentViewRenderView::~ContentViewRenderView()
{
}

// static
static jlong Init(JNIEnv* env,
    const JavaParamRef<jobject>& obj,
    jlong native_root_window)
{
    gfx::NativeWindow root_window = reinterpret_cast<gfx::NativeWindow>(native_root_window);
    ContentViewRenderView* content_view_render_view = new ContentViewRenderView(env, obj, root_window);
    return reinterpret_cast<intptr_t>(content_view_render_view);
}

void ContentViewRenderView::Destroy(JNIEnv* env,
    const JavaParamRef<jobject>& obj)
{
    delete this;
}

void ContentViewRenderView::SetCurrentWebContents(
    JNIEnv* env,
    const JavaParamRef<jobject>& obj,
    const JavaParamRef<jobject>& jweb_contents)
{
    InitCompositor();
    WebContents* web_contents = WebContents::FromJavaWebContents(jweb_contents);
    compositor_->SetRootLayer(web_contents
            ? web_contents->GetNativeView()->GetLayer()
            : scoped_refptr<cc::Layer>());
}

void ContentViewRenderView::SurfaceCreated(JNIEnv* env,
    const JavaParamRef<jobject>& obj)
{
    current_surface_format_ = 0;
    InitCompositor();
}

void ContentViewRenderView::SurfaceDestroyed(JNIEnv* env,
    const JavaParamRef<jobject>& obj)
{
    compositor_->SetSurface(NULL);
    current_surface_format_ = 0;
}

void ContentViewRenderView::SurfaceChanged(
    JNIEnv* env,
    const JavaParamRef<jobject>& obj,
    jint format,
    jint width,
    jint height,
    const JavaParamRef<jobject>& surface)
{
    if (current_surface_format_ != format) {
        current_surface_format_ = format;
        compositor_->SetSurface(surface);
    }
    compositor_->SetWindowBounds(gfx::Size(width, height));
}

void ContentViewRenderView::SetOverlayVideoMode(
    JNIEnv* env,
    const JavaParamRef<jobject>& obj,
    bool enabled)
{
    compositor_->SetHasTransparentBackground(enabled);
    compositor_->SetNeedsComposite();
}

void ContentViewRenderView::UpdateLayerTreeHost()
{
    // TODO(wkorman): Rename Layout to UpdateLayerTreeHost in all Android
    // Compositor related classes.
}

void ContentViewRenderView::OnSwapBuffersCompleted(int pending_swap_buffers)
{
    JNIEnv* env = base::android::AttachCurrentThread();
    Java_ContentViewRenderView_onSwapBuffersCompleted(env, java_obj_);
}

void ContentViewRenderView::InitCompositor()
{
    if (!compositor_)
        compositor_.reset(Compositor::Create(this, root_window_));
}

} // namespace content
